Donny Osmond had much to celebrate on Friday, marking a major milestone with his “sweetheart” wife, Debbie. The 68-year-old penned a touching tribute to celebrate “48 wonderful years” of marriage, alongside a sweet photo of the couple embracing against a picturesque backdrop. “When you get right down to it, life goes by fast. It’s hard to believe it’s been 48 years since I made eternal vows to my sweetheart in the Salt Lake City Temple,” Donny wrote on Instagram. “Together, we’ve built a life full of love, memories, and family—and I’d choose you all over again,” he added. “I love you, sweetheart.” Recommended videoYou may also likeWATCH: Donny Osmond shares rare glimpse of adorable grandchildren Donny also added text over the photo alongside a wedding ring graphic, writing: “Celebrating 48 wonderful years with my best friend.” The veteran performer is no stranger to public declarations of love and penned an equally gushing tribute on the 47th wedding anniversary last year. © InstagramDonny shared this photo to celebrate his 48th wedding anniversary “Thank you, Debbie, for …